1 / tanh(t)
<math xmlns="http://www.w3.org/1998/Math/MathML">
<apply>
<csymbol cd="arith1">divide</csymbol>
<cn>1</cn>
<apply>
<csymbol cd="transc1">tanh</csymbol>
<ci>t</ci>
</apply>
</apply>
</math>
Author: Design Science, Inc. (E. Cannon, E. Tabacman, R.Miner)